EP2025049B1 - Überstromschutzeinrichtung für den einsatz in überspannungsschutzgeräten mit zusätzlichem mechanischen auslöser, bevorzugt als schlagbolzen ausgeführt - Google Patents

Überstromschutzeinrichtung für den einsatz in überspannungsschutzgeräten mit zusätzlichem mechanischen auslöser, bevorzugt als schlagbolzen ausgeführt Download PDF

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Publication number
EP2025049B1
EP2025049B1 EP07728867A EP07728867A EP2025049B1 EP 2025049 B1 EP2025049 B1 EP 2025049B1 EP 07728867 A EP07728867 A EP 07728867A EP 07728867 A EP07728867 A EP 07728867A EP 2025049 B1 EP2025049 B1 EP 2025049B1
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EP
European Patent Office
Prior art keywords
protection device
housing
functional unit
fusible element
cap
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP07728867A
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German (de)
English (en)
French (fr)
Other versions
EP2025049A1 (de
Inventor
Arnd Ehrhardt
Stefanie Schreiter
Georg Wittmann
Hans-Georg Wagner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dehn SE and Co KG
Original Assignee
Dehn and Soehne GmbH and Co KG
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Filing date
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Publication of EP2025049A1 publication Critical patent/EP2025049A1/de
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/44—Structural association with a spark-gap arrester
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
    • H01H85/05—Component parts thereof
    • H01H85/143—Electrical contacts; Fastening fusible members to such contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
    • H01H85/041—Fuses, i.e. expendable parts of the protective device, e.g. cartridges characterised by the type
    • H01H85/0411—Miniature fuses
    • H01H2085/0412—Miniature fuses specially adapted for being mounted on a printed circuit board
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
    • H01H85/041—Fuses, i.e. expendable parts of the protective device, e.g. cartridges characterised by the type
    • H01H85/0411—Miniature fuses
    • H01H2085/0414—Surface mounted fuses

Definitions

  • the invention relates to an overcurrent protection device for use in surge protection devices with additional mechanical release, preferably designed as a firing pin, according to the preamble of patent claim 1.
  • Overvoltage protection devices are used in electrical and information technology networks to protect equipment, consumers and end devices.
  • overvoltage protection devices limit especially in transient overvoltage events, e.g. Lightning events, the voltage to uncritical values.
  • the limitation occurs in case of overvoltage events by the derivation of pulse currents in the transverse path and thus generally parallel to the load terminals.
  • overvoltage protection elements inter alia spark gaps, varistors, suppressor diodes, gas arresters, capacitors and non-linear resistors and their combinations are used.
  • the above-mentioned elements generally have a nonlinear response or a non-linear characteristic.
  • the causes of overload are manifold and specific to the respective protection device.
  • thermal cut-off devices By means of thermal cut-off devices, sufficient protection can usually be achieved within their switching capacity at small leakage currents in the range of mA to several A and in the low-voltage range of the varistor.
  • the varistor can be blown over or over.
  • thermal breakdown or breakdown of the varistor may occur after a time course of a few tens of ms.
  • varistor discs often give the maximum rated current value of such back-up fuses for sufficient protection.
  • Conventional fuses generally respond well below their theoretical adiabatic melting integral value at momentum load.
  • the fuse In addition to the protective function of the overvoltage protection element, the response the fuse often used as a display criterion for the overload and the separation of the overvoltage protection element.
  • the power interruption or the increased voltage drop across the fuse is evaluated.
  • the electrical signal is also used for acoustic displays or the opening and closing of switches for remote signaling.
  • the use of electrical energy for signal delivery has several disadvantages. Many displays require energy and cause unwanted leakage currents. Shutdown on surge current loads of fuses is often undefined and unwanted.
  • the fusible link of fuses can have a variety of damage after the pulse load, which can lead from the separation of individual parallel bottlenecks to the total destruction of the fusible conductor, without a desired high-impedance interruption occurs.
  • the cause of the described behavior lies in the different functioning of the fuse in the case of mains-frequency fault currents in the longitudinal branch and in the case of pulse currents in the shunt branch.
  • the fuse interruption represents the single most point of interruption and the dielectric strength of the tripped fuse must be higher than the mains voltage. This leads to a high-impedance and quite long separation distance within the fuse.
  • the mains voltage resistance is generally taken over by the surge protection device, even with moderate overloads. That is, the fuse is not necessarily burdened with the mains voltage even after their response. This sometimes leads to an undefined separation distance within the fuse.
  • the DE 199 14 313 A1 shows the protection of a so-called starting aid of a spark gap.
  • fuses or reversible fuses are used.
  • the melting of the fuse is used with the aid of electronic circuits for optical, acoustic and / or electronic display.
  • the spark gap should be able to exert a redundant protective function with an increased protection level without an ignition aid. Derivation of a display function from the shutdown behavior of fuses is beyond the EP 1 345247 , of the DE 38 31 935 , of the DE 197 51 470 or for example the DE 32 28 471 previously known.
  • the U.S. Patent 6,157,529 discloses the interruption of a circuit by means of the disconnection of a fuse and a holding coil of a switch.
  • Ignition aids as in the DE 199 14 313 A1 described, are also used in combination arresters. With these arresters, the starting aid itself can be designed as an independent overvoltage protection device, which activates the short-circuit element, generally a spark gap, only at the risk of its own overload via a trigger function.
  • a combination arrester is for example in the DE 198 38 776 C2 disclosed.
  • an object of the invention to provide an advanced overcurrent protection device for use in surge protection devices with additional mechanical release, preferably designed as a firing pin, indicate which has a high age-stable momentum current carrying capacity, a mechanical display function or support such a display and signal function and a high switching capacity.
  • the specified overcurrent protection device should have a small size, easy to install and have a high peak current stability and a high switching voltage.
  • This combination includes a fuse suitable for pulse currents with parallel indicator fuse, which takes over a firing pin function.
  • the firing pin can serve for the mechanical triggering of an optical and / or electrical display.
  • the firing pin and the signal function can be carried out floating or floating.
  • the pulse current carrying capacity of the actual fuse is brought close to the theoretical, ie the material-specific melt integral value (I 2 t value) of the fuse conductor.
  • I 2 t value material-specific melt integral value
  • an otherwise usual over-dimensioning of the fuse can be avoided.
  • This is necessary in the prior art, since the usual fusible conductors are already overloaded significantly below the theoretical I 2 t value due to the dynamic current forces, the asymmetrical current distribution and the aging at pulse currents.
  • the reason for this is the geometry of the fusible conductor, the type of contacting of the fusible conductor, the current conduction to and in the fusible conductor, the fusible conductor fixation and additives which cause aging or premature overloading.
  • the small design created by the invention is in the range of conventional device protection measures of substantially 5x20 mm.
  • Such small devices can be mounted in a particularly simple manner on a circuit board, as an SMD component.
  • the overcurrent protection device comprises a first functional unit containing the mechanical release. This first functional unit has a first Melting on.
  • a second functional unit is designed as actual overload protection and has a second melting element.
  • Each of the functional units is arranged in a housing, wherein on the respective housing lateral, opposite end caps are befindlich and the fusible elements are each arranged inside the housing and are electrically connected to the end caps.
  • the first and the second functional unit are electrically connected in parallel.
  • This parallel circuit is in series with the surge protection device.
  • the functional units form a common mechanical composite, each housing being surrounded by a separate or both housing by a common elastic jacket.
  • connection extension which allows or facilitates the already mentioned PCB assembly of the overall direction.
  • a chamber for receiving a spring-biased firing pin is arranged, wherein the firing pin is held by the first melting element in its rest position. With the melting of the first melting element, the spring biasing force comes into effect and the firing pin moves to its maximum achievable end position.
  • the first fusible element consists of a wire which has a high tensile strength and an I 2 t value, which is significantly lower than that of the material of the second fusible element.
  • the housing of the first functional unit forms an arc switching chamber, which consists of a tubular body, which laterally adjoins a cavity which forms the chamber for receiving the firing pin.
  • one or more insulating plates are arranged, through which or which the first melting element is passed.
  • the arc switch room is filled with an extinguishing agent.
  • the cavity with the firing pin is limited by a Stülpkappe, wherein the side facing away from the arc combustion chamber side of the Stülpkappe forms a stop for the striking plate of the firing pin and thus a route limitation.
  • the impact plate itself can be surrounded by an insulating cap.
  • the striking plate is designed as a punch or striker, the Displacement can be limited by a stop and a recess within a hood cap.
  • the first fusible element may be composed of a composite material and have at least one constriction and / or a portion of different impedance or resistance.
  • the second functional unit has a hollow cylindrical housing with lateral end caps, wherein the second melting element is guided as a band, wire or in a hollow cylindrical shape from cap to cap.
  • the housing of the first functional unit may have the form of a pipe or a hollow cylinder.
  • the wire or hollow cylindrical melting element of the second functional unit is connected by force and / or positive connection with the inner sides or with corresponding openings in or on the caps.
  • the hollow cylinder of the second melting element may have defined bottlenecks and / or tapers.
  • the housing of the second functional unit has a filling.
  • This filling can consist of a high-density bulk material or contain compressible materials.
  • this band consists of flat wire with a width to thickness ratio less than 4: 1.
  • the second fusible element can be held by guide bars, guide rings or the like located in the housing.
  • Both the first and the second functional unit may be surrounded by a common outer housing or arranged in such a housing.
  • Fig. 1 a schematic representation of the electrical arrangement of the overcurrent protection device
  • Fig. 2 a side view of a variant of the overcurrent protection device in electrical and geometric parallel connection
  • Fig. 3 a sectional view through a preferred embodiment of the first functional unit
  • FIG. 4a to 4c Further embodiments of the functional unit with variants of Firing pin design
  • Fig. 6 the arrangement of a resistance material in the arc switching room of the first functional unit
  • Fig. 7 the basic structure of the second functional unit with security tape or security wire
  • Fig. 8 a sectional view of the embodiment similar to the Fig. 7 , but with guide bars;
  • Fig. 9 a sectional view of a combination of the two functional units with recognizable internal structure
  • Fig. 10 a further variant of the combination of the functional units with a changed internal power supply between the first and second functional unit;
  • Fig. 13 Section view of the possibility of execution of the first functional unit, which is separate from the second functional unit such as after Fig. 11 or 12 can be arranged on a printed circuit board in electrical parallel connection, but not in the geometric composite.
  • Fig. 1 shows a schematic representation of the invention.
  • the device A according to the invention consists of two functional units.
  • a functional unit A1 assumes the overload protection for the overvoltage element B and forms the actual overcurrent protection device.
  • a further functional unit A2 realizes, after the functional unit A1 has responded, the mechanical display and signal function with the aid of a firing pin which is preferably used.
  • the presented overcurrent protection device for overvoltage protection devices preferably consists of an electrically as well as geometrically, i. spatially arranged in parallel fixed composite of two functional units 1 and 2.
  • the electrical contacting is preferably carried out together via PCB contactable terminals 6, which can serve at the same time for the mechanical joining of the parallel functional units 1 and 2.
  • the in the Fig. 2 shown terminals 6 may have a taper, whereby the position of the firing pin relative to the board (not shown) is clearly definable.
  • the two connected functional units can also occupy a parallel to the printed circuit board, not shown, or any angular position.
  • Each functional unit 1; 2 is enveloped or surrounded by an elastic jacket 4 on the circumference and by common lateral connection caps 3 and is thereby mechanically stabilized and fixed.
  • the elastic sheath 4 can in a simple form as a tube or shrink tube with or without tissue elements, but also as a second tube, e.g. be made of an elastic plastic material.
  • the first functional unit 1 realizes the desired mechanical display function by means of a firing pin or a firing pin plate 5 and the generation of a high switching voltage.
  • the second functional unit 2 takes over the other tasks already mentioned.
  • the first functional unit 1 includes a mechanism for triggering the firing pin.
  • the firing pin can be exercised at a distance to a maximum of half the total length of the functional unit, a defined force on a triggering system or a display device.
  • the height of the transmittable force can be variably adjusted and specified from approximately 1 N to several 10 N at a defined distance.
  • prestressed compression springs are used for this purpose.
  • the firing pin itself can be used as a visual display in an analogous manner to a simple conventional indicator.
  • gas generators or priming charges for the firing pin function can also be provided.
  • the necessary high and aging stable Preload realized with wire which has a high tensile strength.
  • the I 2 t value of the wire is adjusted so that it is significantly smaller than the I 2 t value of the second functional unit. A value of less than 1% is preferred.
  • the meter resistance of the wire is significantly higher than that in the second functional unit. Preferably, larger ratios than 1: 100 are used.
  • the wire may be wound on a carrier to provide additional impedance.
  • the wire of the first functional unit remains almost unloaded under pulse load.
  • the fusible conductor is also almost distortion-free interrupted by a current which is a multiple of its current carrying capacity. This is also the case with errors due to line frequency currents.
  • Overload factors of approximately 20 to 1000 are preferred. These factors guarantee adiabatic heating of the wire and a so-called strip decay of the fusible conductor. This strip decay leads to a high switching voltage.
  • the height of this tension can be influenced by the geometric design and the choice of material of the wire.
  • the level of the switching voltage is also determined by the error case and the impedance ratios of the feeder circuit.
  • trigger aids which often include a pulse transformer, the generated arc voltage can be increased due to the increase in the inductance of the circuit.
  • switching voltages of a few 100 V up to several kV can be generated even with small dimensions of the functional units. These voltages are generally sufficient to ignite in particular spark gaps with Gêttladungsglazedn.
  • Fig. 3 shows a preferred construction of the first functional unit.
  • the functional unit 1 consists of an arc switching chamber 17 and a cavity 16, which serves to receive the firing pin 5.
  • the arc switch chamber 17 and the cavity 16 are adjacent to each other on a common axis.
  • the arc switch chamber 17 is bounded by a fixed tube 7, for example made of ceramic, and the caps 8 and 9.
  • the fuse element 11 arranged in the interior is led through the arc switching chamber 17 and the cavity 16 to the firing pin 5.
  • a hole is provided in the cap 9.
  • one or two insulating plates 10 are provided.
  • the platelets 10 are preferably made of an elastic and arc-resistant insulating material. This allows easy piercing of the material and close nestling against the fusible conductor 11, whereby an undesirable gap between platelets and fusible conductor can be avoided.
  • the arc switch room can be equipped with an extinguishing agent 15, e.g. be filled from quartz sand material.
  • the cavity 16 is enclosed by a special terminal cap 9.
  • the firing pin 5 has an outer shield, which has a larger dimension than the cavity 16.
  • the firing pin 5 also has a bore through which the fusible conductor 11 is guided and fastened.
  • a prestressed spring 12 which serves to carry out the firing pin function.
  • Fig. 4a to 4c show alternative design variants of the firing pin design.
  • Fig. 4a is the complete firing pin in the cavity of the cap. 9
  • an electrically conductive firing pin is covered by an additional cap 13 made of insulating material.
  • the contact of the firing pin is carried out floating and the cap 13 serves as additional protection against leaking gases or dirt.
  • the stroke and the end force of the firing pin are defined by the stop on the edge of the hood cap 21.
  • the plate 10 in front of the cavity of the cap 9 can be dispensed with.
  • the seal to prevent the blowing out of plasma is determined by the design of the firing pin according to Fig. 4c self-realized. Such a design variant is also suitable for the realization of a pyrotechnic firing pin.
  • insulating platelets 10 serve to seal the switching space, whereby leakage of ionized plasma is prevented. This plasma would not be in contrast to that are discharging behavior of the arrester and mean in the tight space conditions a hazard.
  • the insulated plate 10 also prevents a stable footing of the switching arc on the opposite terminal cap, whereby the switching capacity and thus the load of the first unit is reduced.
  • the entire implementation may consist of an insulating material.
  • the power supply via the front hollow cylinder cap and the firing pin to the wire.
  • the current can be conducted via the spring to the wire, if the spring diameter is greater than the insulated area.
  • wire feedthrough can also be used for fastening the firing pin.
  • wire wire composite materials may be used for the wire.
  • Fig. 5 shows an embodiment with a multiple composite fusible conductor.
  • This design variant has the advantage that the melt conductor evaporates only in the region of the bottleneck. This allows the arc region to be optimally positioned within the arc quenching chamber and reduces the risk of plasma spewing out.
  • Fig. 5 In addition to the fuse impedance another impedance is connected, for example in the form of a resistor 22.
  • This design variant has the advantage that the current can be limited until and after the melting of the fusible conductor. This results in a positive switching capacity.
  • a resistance material 20 is introduced into the arc switching space, at which the actual fusible conductor is contacted.
  • other impedances can also be used.
  • the cap material 8, 9 of the functional unit 1 consist of a resistance material.
  • a common connection cap 3 can be above the current transition to the functional unit 2 of resistance material.
  • measures or measures to increase the impedance such as bottlenecks or meanders, in the connection area between the functional units 1 and 2 are arranged.
  • the reduction of the bias and the centering of the wire can be done by a Lötbefestist in für hereinsky.
  • the feedthrough and the solder e.g., low melting temperature, low volume
  • the solder are selected so that the resulting arc detaches the attachment of the wire.
  • the wire can also be wound several times to distribute the force around the spring.
  • the bolt can be made loose or captive. Likewise, electrically conductive versions of the bolt, but also isolated variants are possible.
  • Electrically conductive versions can be used in addition to the basic functions in addition to the transmission of electrical signals.
  • the isolated versions ensure a desired potential freedom of possible display means.
  • Fig. 7 shows an example of an embodiment variant of the second functional unit.
  • This second functional unit implements the basic functions of the protection device.
  • the attachment of the fusible conductor 30 is carried out only with a minimal use or waiving media that can cause aging of the fusible conductor, eg by oxidation or by diffusion in the normal state or when heated.
  • Such negative media are solders, solders and other materials that tend to diffuse or react with the fusible link. This also applies to the filling medium.
  • solders solders and other materials that tend to diffuse or react with the fusible link. This also applies to the filling medium.
  • large-area clamping connections are preferably used while avoiding constrictions or even welded joints.
  • the fusible conductor 30 is integrally formed in wire form or as a hollow cylinder to achieve maximum pulse current carrying capacity.
  • the hollow cylindrical shape is preferable to a conventional division of parallel fusible conductors, since, despite similarly high switching capacity, it offers fewer disadvantages in terms of aging and possibly uneven current distribution.
  • the rejuvenations can be done both in the extent and in the layer thickness.
  • webs can be applied electrically conductive or non-conductive, whereby the arc can be divided or partially extremely constricted.
  • the waveguide can be designed as a hollow cylinder, but also as a conductive coating of a cylinder.
  • the material may e.g. be gas.
  • a high mechanical strength, a sufficient switching capacity and a high pulse current carrying capacity is given.
  • an embodiment may be useful as a hollow cylinder with internal coating.
  • Such a design also causes a uniform distribution of the pressure wave to the outer wall or to the outer housing.
  • the waveguide can also offer the possibility of integration of the firing pin despite separate arc switch room.
  • the material used for the fusible conductor is preferably copper, silver or their alloys. When using copper, it is expedient to apply a protective layer against oxidation.
  • the guide of the fusible conductor is centrally through the housing 31. The power supply to the caps 32 is made without or with little current loops.
  • the filling medium 33 is chosen so that it does not allow dynamic movements of the fusible conductor 30.
  • quartz sand is selected as filling medium, an optimal particle size distribution and optimized compaction may be sufficient.
  • guide webs 34 correspondingly Fig. 8 be provided.
  • the guide webs 34 can be made insulating or else as metal plates for subdividing the arc.
  • the webs 34 may be connected to each other for mechanical guidance or be supported in a further variant parallel spaced on the inner wall of the housing 31.
  • filling material so-called stone sand is used.
  • high-density bulk materials are suitable for filling.
  • filling media based on epoxy or silicone with or without curing are applicable. These materials can be added high levels of admixtures of extinguishing media, such as sand, ceramics, glass or gas-emitting substances.
  • a sand filling can additionally be used or the use of stabilizing webs or stabilizing liquids for damping movement is advantageous.
  • compressible filling media can be provided or possibilities for damping the pressure wave can be realized. On the one hand, this can be measures for equal distribution of the pressure.
  • additional elastic, but also rigid cylinder between the fusible conductor and the housing wall can be realized.
  • breaking walls and compensation chambers can be created.
  • the filling media may also contain implosive ingredients. Hollow spheres made of glass or ceramic can be used here.
  • the fusible conductor can also be guided in solids. These solids can be designed to support the extinguishing capacity gas-emitting.
  • gas donating substances are e.g. Polymers such as POM, hard gas or ceramics or substances with such admixtures for use.
  • a flat wire can be used as the fusible conductor.
  • Flat wires with a ratio of width to thickness of ⁇ 4: 1 are preferably used here.
  • the design of the fusible conductor as a flat wire leads with decreasing ratio of thickness to width to a reduction in the maximum impulse load over round wires of the same cross-sectional area, but here the switching capacity can be significantly increased.
  • the realization of the fusible conductor as a flat wire also allows additional optimization possibilities.
  • the height of the peak current resistance can be controlled quite easily. This value is particularly important for the protection of varistors in so-called trigger circuits of combination arresters.
  • the position of the flat wire in the fuse influences, in addition to the geometric design of the connections of the second functional unit, the effect of the dynamic current forces on the fusible conductor. If the flat edge of the fusible conductor is perpendicular to the current force effect and the connecting lengths of the second functional unit are as straight as possible, a very high peak current value can be controlled (see principle arrangement according to FIG Fig. 9 ).
  • the overcurrent protection device responds almost exclusively due to the current forces and not due to adiabatic heating.
  • the thermal load is below the melt integral value.
  • the length of the power supply can already be achieved by varying the order of the functional units without changing the structural parts with parallel functional units arranged one above the other.
  • the peak current strength can be further reduced and the extinguishing capacity increased Meander or windings are incorporated.
  • the functional units 1 and 2 have high-strength housing.
  • materials for these housings special ceramics, but also wound glass fiber materials can be used.
  • each housing or both housings are jointly enclosed by an elastic cylinder. This is used as an extra protection in case of overload of the housing or gas leaks between the caps and the housing. Furthermore, the outer rollover distances are extended and critical field strength increases or endangered sliding distances avoided.
  • the material of the elastic cylinder can also consist of a gas-emitting substance or be coated with such a material. This results in the outgassing of hot gas or soot from the fuse to the gas delivery, whereby uniform manifestations are avoided and surface discharges can be prevented.
  • other parts e.g. be provided in the form of webs, which serve for Wegverheyrung.
  • the joint fixation of the two functional units with common stable and positive connection caps a high mechanical stabilization of the functional units with each other, but also the individual components of the functional units, in particular the caps on the housing is achieved.
  • the mechanical strength is further increased.
  • the switching capacity can be further increased compared to a single functional unit.
  • the measures shown lead to a performance that could be significantly increased compared to conventional device protection fuses of the same size. This applies to both the pulse current carrying capacity and the switching capacity.
  • Fig. 11 and 12 show alternative arrangements for mounting the second functional unit 2 on a circuit board. These arrangements should lead to the lowest possible current loop formation.
  • Fig. 1 has the outer cap solder connection tabs 40, which are also suitable for SMD mounting.
  • Fig. 12 shows a variant in which the functional unit is soldered directly into the circuit board 41, wherein solderable terminals 42 is used for this purpose.
  • the attachment of the electrically parallel functional unit 1 can also be appropriate Fig. 13 respectively.
  • the functional unit 1 and 2 the made electrical connection via printed conductors of a board and realized if necessary via printed or discrete impedances.
  • the second functional unit 2 can also be designed as such a fuse.

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  • Fuses (AREA)
  • Emergency Protection Circuit Devices (AREA)
EP07728867A 2006-06-08 2007-05-08 Überstromschutzeinrichtung für den einsatz in überspannungsschutzgeräten mit zusätzlichem mechanischen auslöser, bevorzugt als schlagbolzen ausgeführt Not-in-force EP2025049B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102006026711 2006-06-08
DE102006034404.9A DE102006034404B4 (de) 2006-06-08 2006-07-25 Überstromschutzeinrichtung für den Einsatz mit Überspannungsschutzgeräten, mit einem zusätzlichen als Schlagbolzen ausgeführten mechanischen Auslöser
PCT/EP2007/054414 WO2007141104A1 (de) 2006-06-08 2007-05-08 Überstromschutzeinrichtung für den einsatz in überspannungsschutzgeräten mit zusätzlichem mechanischen auslöser, bevorzugt als schlagbolzen ausgeführt

Publications (2)

Publication Number Publication Date
EP2025049A1 EP2025049A1 (de) 2009-02-18
EP2025049B1 true EP2025049B1 (de) 2013-01-02

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EP07728867A Not-in-force EP2025049B1 (de) 2006-06-08 2007-05-08 Überstromschutzeinrichtung für den einsatz in überspannungsschutzgeräten mit zusätzlichem mechanischen auslöser, bevorzugt als schlagbolzen ausgeführt

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Country Link
EP (1) EP2025049B1 (zh)
JP (1) JP2009540777A (zh)
CN (1) CN101461113B (zh)
DE (1) DE102006034404B4 (zh)
RU (1) RU2407127C2 (zh)
WO (1) WO2007141104A1 (zh)

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DE102006034404B4 (de) 2014-05-28
CN101461113A (zh) 2009-06-17
WO2007141104A1 (de) 2007-12-13
JP2009540777A (ja) 2009-11-19
RU2407127C2 (ru) 2010-12-20
CN101461113B (zh) 2011-12-14
RU2008149083A (ru) 2010-07-20
DE102006034404A1 (de) 2007-12-13
EP2025049A1 (de) 2009-02-18

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